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GHSA-mc52-jpm2-cqh6
No affected components available
Impact
Multi-threaded programs were able to spoof interactive permission prompt by rewriting the prompt to suggest that program is waiting on user confirmation to unrelated action.
A malicious program could clear the terminal screen after permission prompt was shown and write a generic message like so:
// Expected prompt
⚠️ ┌ Deno requests read access to "./log.txt".
├ Requested by `Deno.open()` API
├ Run again with --allow-read to bypass this prompt.
└ Allow? [y/n] (y = yes, allow; n = no, deny) >
// Prompt that users would see
Do you want to continue?
This situation impacts users who use Web Worker API and relied on interactive permission prompt. The reproduction is very timing sensitive and can’t be reliably reproduced on every try.
This problem can not be exploited on systems that do not attach an interactive prompt (for example headless servers).
Patches
The problem has been fixed in Deno v1.29.3; it is recommended all users update to this version.
Workarounds
Run with --no-prompt flag to disable interactive permission prompts.
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. The attacker needs the user to perform some action, like clicking a link. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.
Exploitation activity has been observed. Apply available patches or mitigations urgently.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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